HISTORIC PERSPECTIVE ON OCCUPATIONAL DISEASE

Transcription

1 HISTORIC PERSPECTIVE ON OCCUPATIONAL DISEASE D Linn Holness Gage Occupational & Environmental Health Unit & Centre for Research Expertise in Occupational Disease University of Toronto & St Michael s Hospital

2 Outline Review history of occupational disease over time Prevention Diagnosis and management Compensation Reflection

3 Definitions ILO 1993 Occupational diseases Having a specific or a strong relation to occupation generally with only one causal agent and recognized as such Work-related diseases With multiple causal agents, where factors in the work environment may play a role, together with other risk factors, in the development of such diseases, which have a complex etiology Diseases affecting working populations Without causal relationship with work but which may be aggravated by occupational hazards to health

4 ILO List of Occupational Diseases Diseases caused by agents Chemical, physical, biological e.g. Beryllium Diseases by target organ system Respiratory, skin, musculoskeletal e.g. Pneumoconioses Occupational cancer Cancer caused by the following agents e.g. Asbestos

5 Ancient times Egypt, Greece and Rome Mining one of the oldest industries miners slaves, criminals work = punishment manual trades inferior miners used bags, sacks, animal bladders as masks to decrease dust exposure

6 Middle Ages Central Europe mining a feudal enterprise Serf labour unskilled Growth of trade - increased need for money and capital mines of Central Europe Need for skilled labour Mines deeper, conditions worsened

7 16 th & 17 th centuries Mining, metal work and other trades flourished Some improvement in ventilation Shift from feudalism to capitalism Guilds artisans sickness benefits, funeral benefits

8 16 th & 17 th centuries Awareness of health hazards Agricola Town physician in Bohemia 1556 De Re Metallica hazards of metal mining Paracelsus Town physician in Austria 1567 occ diseases of mine & smelter workers 1572 lead 1575 carbon monoxide arsenic

9 18 th century Bernardino Ramazzini Physician, professor of medicine in Modena and Padua Diseases of Workers 1700 Systematic study of trade diseases Father of Occupational Medicine what is you occupation?

10 18 th century Hale 1743 Importance of ventilation Von Humboldt 1790 s Gas mask, safety lamps for miners

11 Industrial revolution Traditionally India home of cotton industry 10 th century cotton introduced into Spain Production spread throughout Europe Arrival of religious refugees from Antwerp brought cotton production to England Initially spinning & weaving cottage industry Late 18 th century - mechanization - factory Spread to other industries and through Europe, North America

12 Industrial revolution Shifts of population from rural to urban Living conditions Dirt, fuel, crowding, pests, sanitation Epidemics typhus, scarlet fever, smallpox Mechanization Safety issues Science of epidemiology developed

13 Industrial revolution Concept of insurance began to develop Payments of medical care, replacement of income lost as result of disability 1750 s UK Friendly Societies Similar organizations sponsored by workers, employers, townspeople, religious groups, physicians - Scandinavia, Low Countries, Germany

14 Late 18 th century, early 19 th century Liberalism, humanism Public concern influenced government Employers Robert Peel, Robert Owen, Michael Sadler Trade unions Act making trade unions illegal repealed in UK 1824 Organized labour working conditions hours of work

15 Late 18 th century, early 19 th century Medical Influence Percival Potts scrotal cancer and chimney sweeps Thomas Percival - mills Charles Thackrah occ and disease Greenhow dusts and fumes and resp disease Arlidge potters diseases

16 19 th century Europe continual series of legislation related to working conditions UK Factory Acts hours of work, age of work, education for children, physician exams, inspectors, safety? impact but established principle of government intervention

17 19 th century Statutory medical service for factory workers Factory Inspectors Medical certification for children Certifying Surgeons Workers with exposure to lead, white phosphorus, explosives, rubber periodic exams Notification of industrial disease lead, phosphorus, arsenic, anthrax 1898 Thomas Legge Medical Inspector of Factories

18 19 th century Common law employer liable if negligent 3 common defenses Unholy Trinity Assumption of risk Fellow servant rule Contributory negligence Workers rarely successful Late 19 th century WC legislation in Europe 1883 Germany - Bismarck

19 Early 20 th century WC legislation in North America Ontario 1913 Royal Commission Meredith Historic compromise Give up right to sue No fault insurance system financed by employers Elements from UK, Germany, US

20 20 th century Workers compensation Quickly moved from wage loss to clinical ratings, meat chart Many enquiries Continual modifications, additional benefits & coverage Occupational disease 1913 industrial disease 6 listed in Schedule silicosis, pneumoconiosis 1932 cancer 1944 exposure length removed WCB could add to Schedule generic definition of industrial disease

21 Late 19 th, early 20 th century Development of government agencies and professional associations ILO created 1919 declared anthrax occupational disease st list of Occupational Diseases International Congress on workers diseases in Milan ICOH

22 Late 19 th, early 20 th century US government agencies Bureau of Labor 1910 Bureau of Mines 1914 Office of Industrial Hygiene as part of the US Public Health Service

23 Late 19 th, early 20 th century Professional associations Am Assoc Railway Surgeons Am Society of Heating & Ventilating Engineers American Public Health Assoc 1909 section on preventive medicine, industrial hygiene, public health American Medical Assoc symposium on industrial hygiene 1937 Council on Industrial Health

24 Late 19 th, early 20 th century Professional associations National Safety Council 1915 Industrial Medical Association of Preventive Medicine 1916 American Standards Assoc Journal of Industrial Hygiene 1919 American Conference of Govt l Industrial Hygienists 1938

25 20 th century Academic programs 1905 MIT industrial hygiene 1906 University of Pennsylvania Medical School more complete instruction in industrial hygiene 1916 Johns Hopkins 1918 Harvard Clinics 1902 Italy Clinica del Lavoro 1910 Cornell NY, first occ disease clinic

26 Late 19 th, early 20 th century Employers Health services, hospitals for employees Industrial nurses, visiting nurses Employers groups safety codes Labour Bargaining for: Improved working conditions accidents, diseases Inspections Workers compensation

27 World War I Increased industry Increased use of dangerous material Increased emphasis of safety, medical services, first aid

28 Depression Decreased interest in health and safety problems Labour concentrated on monetary issues and unionization Management concentrating on monetary issues

29 World War II Increased productivity Decreased number of workers Assess worker s ability to carry out certain jobs Rehabilitation

30 20 th century Physicians Alice Hamilton occ diseases Hariett Hardy - Beryllium Irving Selikoff - Asbestos

31 Mid 20 th century Renewed interest 1960 s industrial accident rate increased by 30%, coal mining disaster W Virginia 78 miners killed Increased recognition of occupational disease Increased public consciousness of environmental and health concerns Increased wages rethinking of worker goals Benefit levels for compensation had not kept pace, % of labour force not covered, increased cost Problems with government agencies ability to deliver their programs

32 Mid 20 th century Crisis in the Workplace - N Ashford 1976 Increased injury rates Technological change Rise of environmental movement Changing character of the workforce Conflicts Labour management Insufficient database regarding nature and severity of health hazards What is just and fair in public policy and appropriate limits to public policy Various institutions, forces, mechanisms are not connected very well

33 Mid 20 th century Crisis in the Workplace - N Ashford Potentially more important occ disease Subject hotly debated by management, labour, governments Most part not reflected in injury stats Last decade new and newly acknowledged occ disease CWP, Asb-cancer, Be, VC

34 Mid 20 th century Renewed interest resulted in commissions, reviews in many countries Robens UK Principles Self regulation Persuasion over sanctions Worker rights

35 Mid 20 th century Ham Royal Commission Concerns Health and safety of miners Effectiveness of safety programs Purposes Investigate all matters related to health & safety involved in the working conditions & working environment in mines in Ontario Identify relevant data related to silicosis & other occupational hazards of miners in Ontario Review present basis for workers compensation board awards as they relate to environmental health matters affecting miners Make recommendations in relation to above

36 Mid 20 th century Ham Royal Commission cont d Conclusions Major problem policy and performance of responsibility system Lack of information workers & public Confrontational character labour vs mgt Split jurisdictions Federal provincial Provincial - Ministry to Ministry + lack of clearly defined roles Crisis management

37 Mid 20 th century Occupational Health and Safety legislation EU directive General duty Evaluation of risk Program of prevention Establishment of preventive services Worker rights Knowledge Participation Refuse unsafe work and freedom from reprisals

38 1970 s - WC Era of increased discontent Ham Commission Effective lobbying unions, IW, Ombudsman Employers increasing costs Increasing unfunded liability

39 1970 s - WC Weiler - occupational disease Until 1970 s generally not high recognition of multicausal long latency diseases Inherently difficult to tell whether a cancer caused by toxic agent at work or in general environment of personal risk factors WC need a yes or no but medical science is not exact Number of occ disease claims increasing but regularly encountered medical and legal hurdles Age of innocence was over

40 Late 20 th Century WHO 1985 Identification and control of workrelated diseases Musculoskeletal, chronic non specific respiratory, behavioural Adverse psychological factors at work, ergonomics, other environmental hazards

41 Late 20 th Century National OHS organizations developing research agenda US, UK, Italy, EU, Japan NIOSH 10 leading occupational diseases Prevention strategies NORA

42 2000 s ILO Recording & notification of occupational accidents and diseases and ILO list of occupational diseases ILO Global Strategy on Occupational Health & Safety 2003

43 RSF Schilling Both ancient and modern societies have been slow to recognize and control the health hazards associated with work. Sigerist (1943), the medical historian, tells us that a history of developments in occupational health will help to reveal the factors involved those that retard and those that accelerate developments, and so enable a modern society to act more intelligently and pave the way to the future

44 RSF Schilling Wide variation in occupational health standards & practice Humanity of a society Wealth of society Social status of worker Political organization of workers and their representation in government Pioneers advocating improvements by revealing facts about loss of life and sickness caused by workplace Improvements in the future will depend on medical and technological skills being generally available rather than on the expertise of the few

45 Reflection Recognition of occupational disease Lack of occupational health knowledge & skills in health care providers Pioneers - improvements in the future will depend on medical and technological skills being generally available rather than on the expertise of the few Divided jurisdictions gov t depts of labour and health

46 Mark Twain It s been discussed a great deal but in most instances little or nothing is done about it

47 21 st century Burden of occupational disease ILO/WHO Worldwide million deaths attributed to occupation 1.6 million deaths attributed to work-related diseases 217 million cases of occupational disease